Composite drain pan

A method comprising:

• attaching a drain pan to an aircraft proximate an engine, the drain pan comprising a composite material forming a reservoir and a drain;
• catching a liquid from the engine in the reservoir of the drain pan;
• draining the liquid from the reservoir through the drain;
• and supporting a step load on the reservoir of the drain pan by a flange of the reservoir, wherein the drain pan is operable to withstand a fire burning at about 2000 degrees Fahrenheit for at least 15 minutes, and wherein the reservoir comprises:
• a sloped portion sloping toward the drain at a constant slope along a first direction;
• and a curved portion sloping toward the drain at a varying slope along a second direction, wherein the first direction and the second direction are perpendicular to one another.

An aircraft comprising:

• an engine;
• and
• a drain pan comprising:
• a composite material comprising a polymeric resin and a reinforcing fiber, wherein the composite material forms:
• a reservoir to catch a liquid from the engine,
• a drain to drain the liquid from the reservoir, and
• a flange for supporting a step load on a portion of the aircraft,
• wherein the drain pan is operable to withstand a fire burning at about 2000 degrees Fahrenheit for at least 15 minutes,
• wherein the drain pan is a first drain pan and further comprising a second drain pan, and
• wherein the first drain pan and the second drain pan abut one another and form a crest from which the liquid can flow into the first drain pan and the second drain pan.